Strength Enhancement of Regenerated Cellulose Fibers by Adjustment of Hydrogen Bond Distribution in Ionic Liquid
To improve the physical strength of regenerated cellulose fibers, cellulose dissolution was analyzed with a conductor-like screening model for real solvents in which 1-allyl-3-methylimidazolium chloride (AMIMCl) worked only as a hydrogen bond acceptor while dissolving the cellulose. This process cou...
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| Format: | Article |
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MDPI AG
2022-05-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/14/10/2030 |
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| author | Yu Xue Weidong Li Guihua Yang Zhaoyun Lin Letian Qi Peihua Zhu Jinghua Yu Jiachuan Chen |
| author_facet | Yu Xue Weidong Li Guihua Yang Zhaoyun Lin Letian Qi Peihua Zhu Jinghua Yu Jiachuan Chen |
| author_sort | Yu Xue |
| collection | DOAJ |
| description | To improve the physical strength of regenerated cellulose fibers, cellulose dissolution was analyzed with a conductor-like screening model for real solvents in which 1-allyl-3-methylimidazolium chloride (AMIMCl) worked only as a hydrogen bond acceptor while dissolving the cellulose. This process could be promoted by the addition of urea, glycerol, and choline chloride. The dissolution and regeneration of cellulose was achieved through dry-jet and wet-spinning. The results demonstrated that the addition of hydrogen bond donors and acceptors either on their own or in combination can enhance the tensile strength, but their effects on the crystallinity of the regenerated fibers were quite limited. Compared with the regenerated fibers without any additives, the tensile strength was improved from 54.43 MPa to 139.62 MPa after introducing the choline chloride and glycerol, while related the crystallinity was only changed from 60.06% to 62.97%. By contrast, a more compact structure and fewer pores on the fiber surface were identified in samples with additives along with well-preserved cellulose frameworks. Besides, it should be noted that an optimization in the overall thermal stability was obtained in samples with additives. The significant effect of regenerated cellulose with the addition of glycerol was attributed to the reduction of cellulose damage by slowing down the dissolution and cross-linking in the cellulose viscose. The enhancement of the physical strength of regenerated cellulose fiber can be realized by the appropriate adjustment of the hydrogen bond distribution in the ionic liquid system with additives. |
| first_indexed | 2024-03-10T03:00:43Z |
| format | Article |
| id | doaj.art-540ffae8f00f43f6a36325636f0e0fc9 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T03:00:43Z |
| publishDate | 2022-05-01 |
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| record_format | Article |
| series | Polymers |
| spelling | doaj.art-540ffae8f00f43f6a36325636f0e0fc92023-11-23T12:46:22ZengMDPI AGPolymers2073-43602022-05-011410203010.3390/polym14102030Strength Enhancement of Regenerated Cellulose Fibers by Adjustment of Hydrogen Bond Distribution in Ionic LiquidYu Xue0Weidong Li1Guihua Yang2Zhaoyun Lin3Letian Qi4Peihua Zhu5Jinghua Yu6Jiachuan Chen7School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, ChinaState Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, ChinaSchool of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, ChinaState Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, ChinaState Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, ChinaSchool of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, ChinaSchool of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, ChinaState Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, ChinaTo improve the physical strength of regenerated cellulose fibers, cellulose dissolution was analyzed with a conductor-like screening model for real solvents in which 1-allyl-3-methylimidazolium chloride (AMIMCl) worked only as a hydrogen bond acceptor while dissolving the cellulose. This process could be promoted by the addition of urea, glycerol, and choline chloride. The dissolution and regeneration of cellulose was achieved through dry-jet and wet-spinning. The results demonstrated that the addition of hydrogen bond donors and acceptors either on their own or in combination can enhance the tensile strength, but their effects on the crystallinity of the regenerated fibers were quite limited. Compared with the regenerated fibers without any additives, the tensile strength was improved from 54.43 MPa to 139.62 MPa after introducing the choline chloride and glycerol, while related the crystallinity was only changed from 60.06% to 62.97%. By contrast, a more compact structure and fewer pores on the fiber surface were identified in samples with additives along with well-preserved cellulose frameworks. Besides, it should be noted that an optimization in the overall thermal stability was obtained in samples with additives. The significant effect of regenerated cellulose with the addition of glycerol was attributed to the reduction of cellulose damage by slowing down the dissolution and cross-linking in the cellulose viscose. The enhancement of the physical strength of regenerated cellulose fiber can be realized by the appropriate adjustment of the hydrogen bond distribution in the ionic liquid system with additives.https://www.mdpi.com/2073-4360/14/10/2030regenerated cellulose fiberhydrogen bondphysical strengthionic liquidadditive |
| spellingShingle | Yu Xue Weidong Li Guihua Yang Zhaoyun Lin Letian Qi Peihua Zhu Jinghua Yu Jiachuan Chen Strength Enhancement of Regenerated Cellulose Fibers by Adjustment of Hydrogen Bond Distribution in Ionic Liquid Polymers regenerated cellulose fiber hydrogen bond physical strength ionic liquid additive |
| title | Strength Enhancement of Regenerated Cellulose Fibers by Adjustment of Hydrogen Bond Distribution in Ionic Liquid |
| title_full | Strength Enhancement of Regenerated Cellulose Fibers by Adjustment of Hydrogen Bond Distribution in Ionic Liquid |
| title_fullStr | Strength Enhancement of Regenerated Cellulose Fibers by Adjustment of Hydrogen Bond Distribution in Ionic Liquid |
| title_full_unstemmed | Strength Enhancement of Regenerated Cellulose Fibers by Adjustment of Hydrogen Bond Distribution in Ionic Liquid |
| title_short | Strength Enhancement of Regenerated Cellulose Fibers by Adjustment of Hydrogen Bond Distribution in Ionic Liquid |
| title_sort | strength enhancement of regenerated cellulose fibers by adjustment of hydrogen bond distribution in ionic liquid |
| topic | regenerated cellulose fiber hydrogen bond physical strength ionic liquid additive |
| url | https://www.mdpi.com/2073-4360/14/10/2030 |
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